A Study on the Characteristics of Microwave Transmission Lines Having Defected Ground Structures and Lumped Elements

결함접지구조와 집중소자를 지닌 초고주파 전송선로의 전기적 특성 연구

  • 임종식 (순천향대학교 정보기술공학부) ;
  • 배주석 (순천향대학교 정보기술공학부) ;
  • 최관순 (순천향대학교 정보기술공학부) ;
  • 안달 (순천향대학교 정보기술공학부)
  • Published : 2006.08.01

Abstract

In this paper, the transfer characteristics of high frequency transmission line having defected ground structure (DGS) and lumped elements are described. When a DGS, which is a kind of periodic structure, is inserted into a transmission line, its equivalent inductance and capacitance elements are added to the characteristics of the standard transmission line. This generates resonance, 3dB cut-off frequency, low-pass, band rejection, and band pass characteristics, and causes a slow-wave and enlarged electrical length of the transmission line. In addition, if the DGS is combined by a lumped element such as resistor, capacitor, and inductor, the resonant and cut-off frequencies moves up or down and other changes occur in the transmission characteristics. The variation of the transmission characteristics is described with the qualitative prediction and measured data.

Keywords

DGS;defected ground structure;transmission line